Restrained Warping in Cruciform Compression Members
Publication: Journal of Structural Engineering
Volume 114, Issue 1
Abstract
Equal‐leg angle cruciform members are known to be prone to torsional buckling. The primary parameters controlling torsional buckling mode are the width/thickness ratio of the outstanding legs, and the degree of warping restraint provided by the supports, the interconnectors, and the separation gap between the angles. Results are reported of an analytic and numerical study on the effects of warping restraint on the torsional stiffness and on the torsional buckling capacity. The study investigates the effect of different warping restraints, interconnector spacings, and gap separations on the torsional rigidity of four equal‐leg angle cruciforms. The effective torsional rigidity is used in analytic predictions of torsional buckling critical stresses, which are compared with finite‐element, geometrically nonlinear analyses. Recommendations are made for design, and future research directions are suggested.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 114 • Issue 1 • January 1988
Pages: 198 - 210
Copyright
Copyright © 1988 ASCE.
History
Published online: Jan 1, 1988
Published in print: Jan 1988
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